Béda révisi "Tabel lambang matematis"

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<tr> <td colspan=3>&#8711;''f'' (x<sub>1</sub>, &hellip;, x<sub>''n''</sub>) is the vector of partial derivatives (''df'' / ''dx''<sub>1</sub>, &hellip;, ''df'' / ''dx''<sub>''n''</sub>)
<tr> <td colspan=3>If ''f'' (''x'',''y'',''z'') = 3''xy'' + ''z''&sup2; then &#8711;''f'' = (3''y'', 3''x'', 2''z'')<br>
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